General

Overview of CDMA Modules

Introduction

CDMA Modules are similar to CDMA modems, but there's one difference: A CDMA Modem is an external equipment, whereas the
CDMA Module is a module that can be integrated within an equipment. It is an embedded piece of hardware.

A CDMA modem is a wireless modem that works with CDMA networks.
A wireless modem behaves like a Hayes compatible dial-up modem.
The main difference between a standard Hayes modem and a CDMA modem is that a hayes modem sends and receives data through a
fixed telephone line while a CDMA modem sends and receives data through radio waves.

A CDMA modem can be an external unit or a PCMCIA card (also called PC Card).
An external CDMA modem is connected to a PC through a serial cable, a USB cable, Bluetooth or Infrared.

PC'suse AT commands to control a modem.
CDMA modems and normal Hayes modems support a common set of AT commands.
You can use a CDMA modem just like a hayes compatible modem.

CDMA modems support an extended set of AT commands.

Read, write and delete SMS messages.

Send SMS messages.

Monitor the signal strength.

Monitor the charging status and charge level of the battery.

Read, write and searche phone book entries.

The number of SMS messages that can be processed by a CDMA modem is pretty low, approx six messages per minute.